Row for a long time about ancestry? (7)
I believe the answer is:
lineage
'ancestry?' is the definition.
(I know that ancestry can be written as lineage)
'row for a long time' is the wordplay.
'row' becomes 'line' (as in a row of things).
'for' says to put letters next to each other.
'a long time' becomes 'age' (an age is a period of time).
'line'+'age'='LINEAGE'
'about' acts as a link.
(Other definitions for lineage that I've seen before include "The strain" , "Descent from ancestors" , "Pedigree, family tree" , "Family descent" , "Descent (from an ancestor)" .)